WO2024056325A1 - Storage battery module, storage battery module assembly comprising such a module and associated motor vehicle - Google Patents

Storage battery module, storage battery module assembly comprising such a module and associated motor vehicle Download PDF

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Publication number
WO2024056325A1
WO2024056325A1 PCT/EP2023/073051 EP2023073051W WO2024056325A1 WO 2024056325 A1 WO2024056325 A1 WO 2024056325A1 EP 2023073051 W EP2023073051 W EP 2023073051W WO 2024056325 A1 WO2024056325 A1 WO 2024056325A1
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WO
WIPO (PCT)
Prior art keywords
battery module
rear part
storage battery
accumulator battery
side wall
Prior art date
Application number
PCT/EP2023/073051
Other languages
French (fr)
Inventor
Ahmed CHIBANI
Ludovic TESSIER
Original Assignee
Ampere S.A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ampere S.A.S. filed Critical Ampere S.A.S.
Publication of WO2024056325A1 publication Critical patent/WO2024056325A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals

Definitions

  • the present invention generally relates to the field of accumulator batteries.
  • the invention relates more particularly to a storage battery module.
  • Motor vehicles with electric propulsion including vehicles with thermal and electric hybrid propulsion, are generally equipped with an electric motor supplied with current by a plurality of accumulator battery modules.
  • each storage battery module is formed of a housing which houses a plurality of storage battery cells.
  • Such a storage battery module is for example known from document EP3637495.
  • the housing has a rear part topped by a cover so as to define a housing for the accumulator cells.
  • the rear part has a U-shaped part, made in one piece, with a bottom wall and two side walls. Two side cover plates make it possible to complete the side walls of the rear part so as to obtain a closed structure.
  • the cover cooperates with the rear part by snapping.
  • the entire housing (with the cover) then forms a rigid structure to accommodate the accumulator battery cells.
  • a thermally conductive layer is arranged at the bottom wall of the rear part (typically the base of the U of the U-shaped part) so as to allow the cooling of the accumulator battery cells. [0011] However, such a configuration of the rear part does not allow a sufficient cooling of the storage battery cells and therefore does not make it possible to effectively regulate their temperature.
  • the present invention proposes to improve the structure of the accumulator battery module in order to benefit from efficient cooling of the accumulator battery cells included in this module.
  • a storage battery module comprising:
  • a rear part provided with a bottom wall, intended to be brought into contact with a cooling circuit, and with a border running along the bottom wall, the bottom wall having a thickness of less than 3 millimeters, and
  • a front part comprising a front wall bordered by a side wall, said side wall extending towards the edge of the rear part, the front part delimiting with the rear part a housing for receiving a plurality of cells d accumulators, the front part and the rear part being assembled by countersinking said edge of the rear part and the side wall of the front part.
  • the thickness of the bottom wall of the rear part makes it possible to optimize the thermal exchanges between the accumulator battery cells and the cooling circuit.
  • the assembly by countersinking of the front part and the rear part makes it possible to form a storage battery module housing sufficiently rigid to contain the storage battery cells while allowing deformation of this housing so as to contain the expansion of the cells resulting from the thermal forces generated by the cells themselves during their charging and discharging.
  • the joisting includes an assembly of the edge of the rear part and the side wall of the front part by laser welding;
  • the countersinking includes an assembly of the edge of the rear part and the side wall of the front part by laser welding, by brazing or by mechanical fixing;
  • the thickness of the bottom wall is between 0.3 and 2 millimeters
  • the border forms an angle of around 90 degrees with the back wall
  • the rear part is made of an alloy comprising aluminum
  • the front part has greater rigidity than the rear part
  • the plurality of accumulator cells is fixed to the bottom wall of the rear part by gluing;
  • the side wall of the front part has, at its corners, fixing elements to a receiving support of a motor vehicle, said fixing elements being positioned opposite the interrupted corners of the edge of the rear part.
  • the invention also relates to a set of accumulator battery modules comprising:
  • a thermal paste is provided between the cooling circuit and the bottom wall of the rear part of the storage battery module.
  • the receiving support comprises means for fixing said accumulator battery module, said fixing means being intended to cooperate with the fixing elements of the side wall of the front part of said accumulator battery module.
  • the invention finally relates to a motor vehicle equipped with such a set of accumulator battery modules.
  • FIG. 1 represents a schematic view of a motor vehicle equipped with a set of accumulator battery modules according to the invention.
  • FIG. 2 is an exploded view of the set of storage battery modules of Figure 1.
  • FIG 1 there is shown a motor vehicle 1 equipped with a set 10 of accumulator battery modules conforming to the invention.
  • This motor vehicle 1 is a motor vehicle with electric or hybrid propulsion provided with an electric motor. At least one set 10 of accumulator battery modules is designed to supply electric current to the electric motor of the motor vehicle 1.
  • the accumulator battery module assembly 10 comprises a receiving support 20 for a accumulator battery module (also called “receiving support 20” in the following ) and at least one storage battery module 30 (also called “module 30” in the following).
  • the receiving support 20 is for example attached here to the motor vehicle 1, while the accumulator battery module 30 is attached to the receiving support 20.
  • FIG 2 represents a schematic exploded perspective view of the elements included in the accumulator battery module 30.
  • This module 30 comprises a rear part 32, a front part 34 and a plurality of accumulator battery cells 35 (for reasons of clarity, only one accumulator battery cell 35 is shown in Figure 2).
  • the terms “front” and “rear” are used in relation to the positioning of the element on the receiving support (on which the element concerned is reported).
  • the rear of this element designates the side facing the receiving support on which the element is attached while the front designates the side facing away from this receiving support.
  • the rear part 32 is intended to be brought into contact with a cooling circuit 27 present in the receiving support 20.
  • the rear part 32 is made in one piece. It is, for example, made of an alloy comprising aluminum. Alternatively, it can be formed solely from aluminum.
  • the rear part 32 comprises a bottom wall 32A and a border 32B running along the bottom wall 32A.
  • the border 32B rises forward from the bottom wall 32A.
  • This border 32B forms an angle of around 90 degrees with the bottom wall 32A. This 90 degree arrangement makes it possible to limit the bulk of the rear part 32 (in particular when it is arranged in the receiving support 20).
  • the edge 32B has a height less than or equal to 10 millimeters (mm). Preferably, this height is between 3 and 10 mm. This ensures that there is enough material to assemble the rear part 32 and the front part 34 (the assembly of the rear part 32 and the front part 34 is described below).
  • the border 32B generally has a rectangular profile.
  • the border 32B is interrupted at its corners. This truncated shape at the corners is advantageous to allow the fixing of the accumulator battery module 30 on the receiving support 20.
  • the bottom wall 32A has a thickness of less than 3 mm. This thickness of the bottom wall 32A then makes it possible to optimize the thermal exchanges between the cells 35 of the accumulator battery (also called “cells 35" in this description) and the cooling circuit 27. Furthermore, such a thickness allows to reduce the total mass of the accumulator battery module 30.
  • the thickness of the bottom wall 32A is between 0.3 and 2 mm. More preferably, it is between 0.7 and 2 mm.
  • the front part 34 of the accumulator battery module 30 comprises a front wall 34A bordered by a side wall 34B, extending from the front wall 34A.
  • the side wall 34B of the front part 34 extends towards the edge 32B of the rear part 32.
  • the side wall 34B of the front part 34 extends, from the front wall, towards the rear of the battery module 30 accumulators.
  • the rear part 32 and the front part 34 form an inverted shoe box, with the rear part 32 forming the lid of this box and the front part 34 the container of this box.
  • the front part 34 is for example made of aluminum. It has greater rigidity than the rear part 32.
  • a rigidity test can be implemented.
  • the rear part 32 is for example fixed to a test support at a first point and a mechanical stress is applied to this rear part 32 at a second point separated from the first.
  • the same mechanical stress is applied to the front part 34 fixed on the same test support, with the same distance between the fixing point and the point of application of the stress. It is then considered that the front part 34 has a greater rigidity than that of the rear part 32 if, after the application of the mentioned stress, a greater deformation is observed at the level of the rear part than that of the rear part 32. at the level of the front part 34.
  • the side wall 34B of the front part has, at its corners, fixing elements 34C to the receiving support 20 of the motor vehicle 1.
  • These fixing elements 34C are here in the form of columns pierced with a longitudinal opening designed to cooperate with complementary fixing means 22A present on the receiving support 20.
  • fixing elements 34C can cooperate with the means 22C of the receiving support 20
  • the fixing elements 34C are positioned opposite the interrupted corners of the bottom wall 32B of the rear part 32. In this way , when the module 30 is attached to the receiving support, the cooperation between the fixing elements 34C of the front part 34 and the fixing means 22C of the receiving support 20 is not hindered by the rear part 32 of the module 30 .
  • the front part 34 and the rear part 32 are assembled so as to delimit a housing for receiving a plurality of accumulator battery cells 35 (only one of which is visible in Figure 2).
  • the front portion 34 and the rear portion 32 form a housing of the storage battery module 30 housing the plurality of storage battery cells 35.
  • the front part 34 and the front part 32 are assembled by countersinking the edge 32B of the rear part 32 and the side wall 34B of the front part 34.
  • the term “smoothing” means a method of assembling two metal walls placed end to end (in the extension of one another) so as to obtain a final surface that is generally smooth and without offset. thickness between the two assembled walls.
  • the two metal walls are, on the one hand, the border 32B of the rear part 32 and, on the other hand, the side wall 34B of the front part 34.
  • each portion of the border 32B of the rear part 32 is assembled by countersinking to the corresponding part (that is to say located opposite the portion of the edge 32B) of the side wall 34B of the front part 34 ( Figure 2).
  • This assembly method by flushing makes it possible to form a storage battery module housing that is sufficiently rigid to contain the storage battery cells while allowing expansion resulting from thermal forces generated by the cells themselves. during their charging and discharging.
  • this method allows the assembly of a rear part and a front part having different thicknesses and formed of different materials while guaranteeing the properties of rigidity and expansion essential to a storage battery module. .
  • the merging is here favored by the properties of the edge 32B as described previously. Indeed, a height of less than 10 mm and an orientation of the edge 32B at 90 degrees relative to the bottom wall 32A make it possible to improve the efficiency of the merging.
  • the assembly by countersinking of the edge 32B of the rear part 32 and of the side wall 34B of the front part 34 is carried out by welding.
  • This welding is for example laser welding.
  • the countersinking can correspond to an assembly by brazing or even by mechanical fixing, making it possible to obtain a smooth final surface, with no difference in thickness between the edge of the rear part and the side wall of the front part.
  • the plurality of accumulator battery cells 35 is positioned in the housing formed by the assembly of the rear part 32 and the front part 34.
  • the accumulator battery cells 35 are for example positioned one next to the other. next to others. For example, there are sixteen of them here.
  • each accumulator battery cell 35 is for example fixed by gluing, by an adhesive element 38 shown in Figure 2, on the bottom wall 32A of the rear part 32 of the module 30.
  • the cells 35 are for example here cells with a flexible envelope, that is to say cells 35 whose envelopes can be deformed during their insertion into the housing formed by the front part 34 and the rear part 32 and during their charging and discharging.
  • the front part 34 of the accumulator battery module 30 makes it possible to contain the deformation of the cells thanks to its properties described above.
  • the cells 35 with a flexible envelope comprise a flexible outer envelope which contains inside an electrolyte of organic solution or of a solution based on carbonate and lithium salts.
  • the plastic film is intended to isolate the electrolyte contained in cell 35 from the aluminum film.
  • the accumulator battery module 30 (formed by the front part 34, the rear part 32 and housing the cells 35) is positioned in the reception support 20.
  • the receiving support 20 here has a generally parallelepiped shape. It comprises a bottom 22 of rectangular shape, from the edges of which rise three side walls 23, 24, 25 which delimit between them a reception housing 21 of the accumulator battery module 30.
  • the two side walls 23, 25 are located facing each other while opposite the side wall 24, the receiving support 20 also has a side wall portion extending facing each other. of this side wall 24 (but which is not shown in Figure 2 for the sake of clarity).
  • the receiving support 22 comprises, at its bottom 22, a cooling circuit 27. The cooling effect is for example obtained from the circulation of water in the cooling circuit 27.
  • the cooling circuit 27 is designed to cool, by conduction, the storage battery cells 35.
  • the bottom wall 32 of the rear part 32 of the accumulator battery module 30 is positioned in contact with the bottom 22 of the receiving support 20.
  • a thermal paste 26 is positioned between the bottom 22 of the receiving support 20 and the bottom wall 32 of the rear part 32 of the battery module 30. 'Accumulators. In other words, this thermal paste 26 is positioned between the cooling circuit 27 and the bottom wall 32 of the rear part 32 of the accumulator battery module 30 so as to improve the efficiency of thermal conduction between the cooling circuit 27 and the cells 35 (fixed on the bottom wall 32 of the rear part 32 of the accumulator battery module 30).
  • This thermal paste 26 makes it possible to avoid the formation of an air gap between the cooling circuit 27 and the cells 35, which makes it possible to improve the conduction phenomenon and therefore the cooling.
  • the receiving support 20 is for example formed here so as to be impervious to drops of water or dust which could enter the accumulator battery module assembly 10. Waterproofing is here evaluated according to the IP67 standard according to the EN60529 standard.
  • the bottom 22 of the receiving support 20 comprises fixing means 22A.
  • These fixing means 22A are designed to cooperate with the fixing elements 34C of the front part 34 of the side wall 34B of the module 30.
  • the fixing means 22A are formed by lugs 22A projecting from the bottom 22 of the receiving support 20. These lugs 22A extend, from the bottom 22, towards the 'front of the receiving support 20.
  • Each lug 22A cooperates here, by nesting, with an opening corresponding longitudinal section of a column 34C of the side wall 34B of the front part 34.
  • the border can be continuous over the entire periphery of the back wall (in other words, alternatively, the border can be continuous, including at its corners).
  • the bottom wall of the rear part may have openings, for example located near the corners of the bottom wall of the rear part.
  • the fixing of the module 30 on the receiving support 20 can be carried out by passing fixing elements (such as screws) through the columns of the side wall of the front part, then through the openings in the bottom wall of the rear part so as to cooperate with complementary fixing means present in the bottom of the receiving support.
  • fixing elements such as screws
  • the dimensions of the front and rear parts of the accumulator battery module are adapted according to the number of accumulator battery cells housed in the module. In the example described above, the dimensions are adjusted so that the storage battery module contains 16 cells.
  • the present invention obviously applies in the case where a plurality of accumulator battery modules are included in the motor vehicle.
  • a plurality of sets 10 of accumulator battery modules can be considered juxtaposed next to each other in the motor vehicle. It can also be considered a single receiving support accommodating a plurality of accumulator battery modules (the accumulator battery modules being positioned for example next to each other on the bottom of the single receiving support).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention relates to a storage battery module comprising: - a rear portion (32) provided with a bottom wall (32A), intended to be placed in contact with a cooling circuit (27), and with an edge (32B) running along the bottom wall, the bottom wall having a thickness of less than 3 millimetres; and - a front portion (34) comprising a front wall (34A) bordered by a side wall (34B), the side wall extending in the direction of the border of the rear portion, the front portion delimiting with the rear portion a housing for receiving a plurality of storage cells (35), the front portion and the rear portion being assembled by joggling the border of the rear portion and the side wall of the front portion. The invention also relates to a storage battery module assembly (10) comprising such a module and an associated motor vehicle.

Description

MODULE DE BATTERIE D’ACCUMULATEURS, ENSEMBLE DE MODULE DE BATTERIE STORAGE BATTERY MODULE, BATTERY MODULE ASSEMBLY
D’ACCUMULATEURS COMPRENANT UN TEL MODULE ET VEHICULE AUTOMOBILE ASSOCIEOF BATTERIES COMPRISING SUCH A MODULE AND ASSOCIATED MOTOR VEHICLE
DOMAINE TECHNIQUE DE L'INVENTION TECHNICAL FIELD OF THE INVENTION
[0001 ] La présente invention concerne de manière générale le domaine des batteries d’accumulateurs. [0001] The present invention generally relates to the field of accumulator batteries.
[0002] L’invention concerne plus particulièrement un module de batterie d’accumulateurs. [0002] The invention relates more particularly to a storage battery module.
[0003] Elle concerne également un ensemble de module de batterie d’accumulateurs comprenant un tel module. [0003] It also relates to a set of accumulator battery modules comprising such a module.
[0004] Elle concerne encore un véhicule automobile équipé d’un tel ensemble. [0004] It also concerns a motor vehicle equipped with such an assembly.
ETAT DE LA TECHNIQUE STATE OF THE ART
[0005] Les véhicules automobiles à propulsion électrique, incluant les véhicules à propulsion hybride thermique et électrique, sont généralement équipés d'un moteur électrique alimenté en courant par une pluralité de modules de batterie d’accumulateurs. [0005] Motor vehicles with electric propulsion, including vehicles with thermal and electric hybrid propulsion, are generally equipped with an electric motor supplied with current by a plurality of accumulator battery modules.
[0006] De manière classique, chaque module de batterie d’accumulateurs est formé d’un boîtier qui loge une pluralité de cellules de batterie d’accumulateurs. [0006] Conventionally, each storage battery module is formed of a housing which houses a plurality of storage battery cells.
[0007] Un tel module de batterie d’accumulateurs est par exemple connu du document EP3637495. [0007] Such a storage battery module is for example known from document EP3637495.
[0008] Dans ce document, le boîtier présente une partie arrière surmontée d’un couvercle de manière à définir un logement d’accueil pour les cellules d’accumulateurs. La partie arrière présente une partie en forme de U, réalisée d’une seule pièce, avec une paroi de fond et deux parois latérales. Deux plaques de couverture latérales permettent de compléter les parois latérales de la partie arrière de manière à obtenir une structure fermée. [0008] In this document, the housing has a rear part topped by a cover so as to define a housing for the accumulator cells. The rear part has a U-shaped part, made in one piece, with a bottom wall and two side walls. Two side cover plates make it possible to complete the side walls of the rear part so as to obtain a closed structure.
[0009] Le couvercle coopère avec la partie arrière par encliquetage. L’ensemble du boîtier (avec le couvercle) forme alors une structure rigide permettant d’accueillir les cellules de batterie d’accumulateurs. [0009] The cover cooperates with the rear part by snapping. The entire housing (with the cover) then forms a rigid structure to accommodate the accumulator battery cells.
[0010] Une couche thermiquement conductrice est disposée au niveau de la paroi de fond de la partie arrière (typiquement la base du U de la partie en forme de U) de manière à permettre le refroidissement des cellules de batterie d’accumulateurs. [0011 ] Cependant, une telle configuration de la partie arrière ne permet pas un refroidissement suffisant des cellules de batterie d’accumulateurs et ne permet donc pas de réguler efficacement la température de celles-ci. [0010] A thermally conductive layer is arranged at the bottom wall of the rear part (typically the base of the U of the U-shaped part) so as to allow the cooling of the accumulator battery cells. [0011] However, such a configuration of the rear part does not allow a sufficient cooling of the storage battery cells and therefore does not make it possible to effectively regulate their temperature.
PRESENTATION DE L'INVENTION PRESENTATION OF THE INVENTION
[0012] Afin de remédier aux inconvénients précités, la présente invention propose d’améliorer la structure du module de batterie d’accumulateurs afin de bénéficier d’un refroidissement performant des cellules de batterie d’accumulateurs comprises dans ce module. [0012] In order to remedy the aforementioned drawbacks, the present invention proposes to improve the structure of the accumulator battery module in order to benefit from efficient cooling of the accumulator battery cells included in this module.
[0013] Plus particulièrement, on propose selon l’invention un module de batterie d’accumulateurs comprenant : [0013] More particularly, according to the invention we propose a storage battery module comprising:
- une partie arrière munie d’une paroi de fond, destinée à être mise en contact avec un circuit de refroidissement, et d’une bordure longeant la paroi de fond, la paroi de fond présentant une épaisseur inférieure à 3 millimètres, et - a rear part provided with a bottom wall, intended to be brought into contact with a cooling circuit, and with a border running along the bottom wall, the bottom wall having a thickness of less than 3 millimeters, and
- une partie avant comportant une paroi avant bordée par une paroi latérale, ladite paroi latérale s’étendant en direction de la bordure de la partie arrière, la partie avant délimitant avec la partie arrière un logement d’accueil d’une pluralité de cellules d’accumulateurs, la partie avant et la partie arrière étant assemblées par soyage de ladite bordure de la partie arrière et de la paroi latérale de la partie avant. - a front part comprising a front wall bordered by a side wall, said side wall extending towards the edge of the rear part, the front part delimiting with the rear part a housing for receiving a plurality of cells d accumulators, the front part and the rear part being assembled by countersinking said edge of the rear part and the side wall of the front part.
[0014] Ainsi, d’après la présente invention, l’épaisseur de la paroi de fond de la partie arrière permet d’optimiser les échanges thermiques entre les cellules de batterie d’accumulateurs et le circuit de refroidissement. [0014] Thus, according to the present invention, the thickness of the bottom wall of the rear part makes it possible to optimize the thermal exchanges between the accumulator battery cells and the cooling circuit.
[0015] De plus, l’assemblage par soyage de la partie avant et de la partie arrière permet de former un boîtier de module de batterie d’accumulateurs suffisamment rigide pour contenir les cellules de batterie d’accumulateurs tout en permettant une déformation de ce boîtier de manière à contenir la dilatation des cellules résultant des efforts thermiques générés par les cellules elles-mêmes lors de leur charge et décharge. [0015] In addition, the assembly by countersinking of the front part and the rear part makes it possible to form a storage battery module housing sufficiently rigid to contain the storage battery cells while allowing deformation of this housing so as to contain the expansion of the cells resulting from the thermal forces generated by the cells themselves during their charging and discharging.
[0016] Ainsi, ces deux caractéristiques combinées permettent d’assurer un bon refroidissement thermique des cellules, même pendant les phases de charge et décharge les plus contraignantes. [0016] Thus, these two characteristics combined make it possible to ensure good thermal cooling of the cells, even during the most restrictive charging and discharging phases.
[0017] D’autres caractéristiques avantageuses et non limitatives du module de batterie d’accumulateurs conforme à l’invention, prises individuellement ou selon toutes les combinaisons techniquement possibles, sont les suivantes : - la bordure présente une hauteur inférieure à 10 millimètres ; [0017] Other advantageous and non-limiting characteristics of the accumulator battery module according to the invention, taken individually or in all technically possible combinations, are as follows: - the border has a height of less than 10 millimeters;
- le soyage comprend un assemblage de la bordure de la partie arrière et de la paroi latérale de la partie avant par soudage laser ; - the joisting includes an assembly of the edge of the rear part and the side wall of the front part by laser welding;
- le soyage comprend un assemblage de la bordure de la partie arrière et de la paroi latérale de la partie avant par soudage laser, par brasage ou par fixation mécanique ; - the countersinking includes an assembly of the edge of the rear part and the side wall of the front part by laser welding, by brazing or by mechanical fixing;
- l’épaisseur de la paroi de fond est comprise entre 0,3 et 2 millimètres ; - the thickness of the bottom wall is between 0.3 and 2 millimeters;
- la bordure forme un angle de l’ordre de 90 degrés avec la paroi de fond ; - the border forms an angle of around 90 degrees with the back wall;
- la partie arrière est formée d’un alliage comprenant de l’aluminium ; - the rear part is made of an alloy comprising aluminum;
- la partie avant présente une rigidité supérieure à celle de la partie arrière ; - the front part has greater rigidity than the rear part;
- la pluralité de cellules d’accumulateurs est fixée sur la paroi de fond de la partie arrière par collage ; - the plurality of accumulator cells is fixed to the bottom wall of the rear part by gluing;
- ladite bordure est interrompue au niveau de coins ; et - said border is interrupted at the corners; And
- la paroi latérale de la partie avant présente, au niveau de ses coins, des éléments de fixation à un support de réception d’un véhicule automobile, lesdits éléments de fixation étant positionnés en regard des coins interrompus de la bordure de la partie arrière. - the side wall of the front part has, at its corners, fixing elements to a receiving support of a motor vehicle, said fixing elements being positioned opposite the interrupted corners of the edge of the rear part.
[0018] L’invention concerne également un ensemble de module de batterie d’accumulateurs comprenant : [0018] The invention also relates to a set of accumulator battery modules comprising:
- un support de réception d’un module de batterie d’accumulateurs, ledit support de réception étant muni d’un circuit de refroidissement, et - a support for receiving a storage battery module, said reception support being provided with a cooling circuit, and
- un module de batterie d’accumulateurs tel qu’introduit précédemment, la paroi de fond de la partie arrière dudit module de batterie d’accumulateurs étant positionnée en contact dudit circuit de refroidissement. - an accumulator battery module as introduced previously, the bottom wall of the rear part of said accumulator battery module being positioned in contact with said cooling circuit.
[0019] Il est prévu une pâte thermique entre le circuit de refroidissement et la paroi de fond de la partie arrière du module de batterie d’accumulateurs. [0019] A thermal paste is provided between the cooling circuit and the bottom wall of the rear part of the storage battery module.
[0020] Le support de réception comprend des moyens de fixation dudit module de batterie d’accumulateurs, lesdits moyens de fixation étant destinés à coopérer avec les éléments de fixation de la paroi latérale de la partie avant dudit module de batterie d’accumulateurs. The receiving support comprises means for fixing said accumulator battery module, said fixing means being intended to cooperate with the fixing elements of the side wall of the front part of said accumulator battery module.
[0021 ] L’invention concerne enfin un véhicule automobile équipé d’un tel ensemble de module de batterie d’accumulateurs. [0021] The invention finally relates to a motor vehicle equipped with such a set of accumulator battery modules.
[0022] Bien entendu, les différentes caractéristiques, variantes et formes de réalisation de l'invention peuvent être associées les unes avec les autres selon diverses combinaisons dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. [0022] Of course, the different characteristics, variants and embodiments of the invention can be associated with each other according to various combinations to the extent that they are not incompatible or exclusive of each other.
DESCRIPTION DETAILLEE DE L'INVENTION DETAILED DESCRIPTION OF THE INVENTION
[0023] La description qui va suivre en regard des dessins annexés, donnés à titre d’exemples non limitatifs, fera bien comprendre en quoi consiste l’invention et comment elle peut être réalisée. The description which follows with reference to the appended drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be carried out.
[0024] Sur les dessins annexés : [0024] In the attached drawings:
[0025] [Fig. 1 ] représente une vue schématique d’un véhicule automobile équipé d’un ensemble de modules de batterie d’accumulateurs conforme à l’invention ; et [0025] [Fig. 1] represents a schematic view of a motor vehicle equipped with a set of accumulator battery modules according to the invention; And
[0026] [Fig. 2] est une vue éclatée de l’ensemble de modules de batterie d’accumulateurs de la figure 1 . [0026] [Fig. 2] is an exploded view of the set of storage battery modules of Figure 1.
[0027] Sur la figure 1 , on a représenté un véhicule automobile 1 muni d’un ensemble 10 de modules de batterie d’accumulateurs conforme à l’invention. [0027] In Figure 1, there is shown a motor vehicle 1 equipped with a set 10 of accumulator battery modules conforming to the invention.
[0028] Ce véhicule automobile 1 est un véhicule automobile à propulsion électrique ou hybride muni d’un moteur électrique. Au moins un ensemble 10 de modules de batterie d’accumulateurs est conçu pour alimenter en courant électrique le moteur électrique du véhicule automobile 1. This motor vehicle 1 is a motor vehicle with electric or hybrid propulsion provided with an electric motor. At least one set 10 of accumulator battery modules is designed to supply electric current to the electric motor of the motor vehicle 1.
[0029] Comme le montrent les figures 1 et 2, l’ensemble 10 de module de batterie d’accumulateurs comprend un support de réception 20 d’un module de batterie d’accumulateurs (aussi appelé « support de réception 20 » dans la suite) et au moins un module 30 de batterie d’accumulateurs (aussi appelé « module 30 » dans la suite). As shown in Figures 1 and 2, the accumulator battery module assembly 10 comprises a receiving support 20 for a accumulator battery module (also called “receiving support 20” in the following ) and at least one storage battery module 30 (also called “module 30” in the following).
[0030] Le support de réception 20 est par exemple ici solidaire du véhicule automobile 1 , tandis que le module 30 de batterie d’accumulateurs est rapporté dans le support de réception 20. [0030] The receiving support 20 is for example attached here to the motor vehicle 1, while the accumulator battery module 30 is attached to the receiving support 20.
[0031 ] La figure 2 représente une vue schématique en perspective éclatée des éléments compris dans le module 30 de batterie d’accumulateurs. Ce module 30 comprend une partie arrière 32, une partie avant 34 et une pluralité de cellules 35 de batterie d’accumulateurs (pour des raisons de clarté, une seule cellule 35 de batterie d’accumulateurs est représentée sur la figure 2). [0031] Figure 2 represents a schematic exploded perspective view of the elements included in the accumulator battery module 30. This module 30 comprises a rear part 32, a front part 34 and a plurality of accumulator battery cells 35 (for reasons of clarity, only one accumulator battery cell 35 is shown in Figure 2).
[0032] Dans la présente description, les termes « avant » et « arrière » sont utilisés par rapport au positionnement de l’élément sur le support de réception (sur lequel est rapporté l’élément concerné). L’arrière de cet élément désigne le côté tourné vers le support de réception sur lequel est rapporté l’élément tandis que l’avant désigne le côté tourné à l’opposé de ce support de réception. [0032] In the present description, the terms “front” and “rear” are used in relation to the positioning of the element on the receiving support (on which the element concerned is reported). The rear of this element designates the side facing the receiving support on which the element is attached while the front designates the side facing away from this receiving support.
[0033] La partie arrière 32 est destinée à être mise en contact avec un circuit de refroidissement 27 présent dans le support de réception 20. The rear part 32 is intended to be brought into contact with a cooling circuit 27 present in the receiving support 20.
[0034] La partie arrière 32 est réalisée d’une seule pièce. Elle est par exemple formée d’un alliage comprenant de l’aluminium. En variante, elle peut être formée uniquement en aluminium. The rear part 32 is made in one piece. It is, for example, made of an alloy comprising aluminum. Alternatively, it can be formed solely from aluminum.
[0035] Comme cela est représenté sur la figure 2, la partie arrière 32 comprend une paroi de fond 32A et une bordure 32B longeant la paroi de fond 32A. La bordure 32B s’élève, vers l’avant, depuis la paroi de fond 32A. Cette bordure 32B forme un angle de l’ordre de 90 degrés avec la paroi de fond 32A. Cet arrangement à 90 degrés permet de limiter l’encombrement de la partie arrière 32 (notamment lors de sa disposition dans le support de réception 20). As shown in Figure 2, the rear part 32 comprises a bottom wall 32A and a border 32B running along the bottom wall 32A. The border 32B rises forward from the bottom wall 32A. This border 32B forms an angle of around 90 degrees with the bottom wall 32A. This 90 degree arrangement makes it possible to limit the bulk of the rear part 32 (in particular when it is arranged in the receiving support 20).
[0036] La bordure 32B présente une hauteur inférieure ou égale à 10 millimètres (mm). De préférence, cette hauteur est comprise entre 3 et 10 mm. Cela permet de s’assurer de disposer d’assez de matière pour assembler la partie arrière 32 et la partie avant 34 (l’assemblage de la partie arrière 32 et de la partie avant 34 est décrit ci-après). [0036] The edge 32B has a height less than or equal to 10 millimeters (mm). Preferably, this height is between 3 and 10 mm. This ensures that there is enough material to assemble the rear part 32 and the front part 34 (the assembly of the rear part 32 and the front part 34 is described below).
[0037] La bordure 32B présente globalement un profil rectangulaire. Ici, comme cela est visible sur la figure 2, la bordure 32B est interrompue au niveau de ses coins. Cette forme tronquée au niveau des coins est avantageuse pour permettre la fixation du module 30 de batterie d’accumulateurs sur le support de réception 20. The border 32B generally has a rectangular profile. Here, as can be seen in Figure 2, the border 32B is interrupted at its corners. This truncated shape at the corners is advantageous to allow the fixing of the accumulator battery module 30 on the receiving support 20.
[0038] De manière avantageuse selon l’invention, la paroi de fond 32A présente une épaisseur inférieure à 3 mm. Cette épaisseur de la paroi de fond 32A permet alors d’optimiser les échanges thermiques entre les cellules 35 de batterie d’accumulateurs (également nommées « cellules 35 » dans cette description) et le circuit de refroidissement 27. Par ailleurs, une telle épaisseur permet de diminuer la masse totale du module 30 de batterie d’accumulateurs. [0038] Advantageously according to the invention, the bottom wall 32A has a thickness of less than 3 mm. This thickness of the bottom wall 32A then makes it possible to optimize the thermal exchanges between the cells 35 of the accumulator battery (also called "cells 35" in this description) and the cooling circuit 27. Furthermore, such a thickness allows to reduce the total mass of the accumulator battery module 30.
[0039] De manière préférentielle, l’épaisseur de la paroi de fond 32A est comprise entre 0,3 et 2 mm. De préférence encore, elle est comprise entre 0,7 et 2 mm. Preferably, the thickness of the bottom wall 32A is between 0.3 and 2 mm. More preferably, it is between 0.7 and 2 mm.
[0040] Comme le montre la figure 2, la partie avant 34 du module 30 de batterie d’accumulateurs comprend une paroi avant 34A bordée d’une paroi latérale 34B, s’étendant à partir de la paroi avant 34A. La paroi latérale 34B de la partie avant 34 s’étend en direction de la bordure 32B de la partie arrière 32. En d’autres termes, la paroi latérale 34B de la partie avant 34 s’étend, à partir de la paroi avant, vers l’arrière du module 30 de batterie d’accumulateurs. A titre d’illustration, comme cela est visible sur la figure 2, la partie arrière 32 et la partie avant 34 forment une boîte de chaussures renversée, avec la partie arrière 32 formant le couvercle de cette boîte et la partie avant 34 le contenant de cette boîte. As shown in Figure 2, the front part 34 of the accumulator battery module 30 comprises a front wall 34A bordered by a side wall 34B, extending from the front wall 34A. The side wall 34B of the front part 34 extends towards the edge 32B of the rear part 32. In other words, the side wall 34B of the front part 34 extends, from the front wall, towards the rear of the battery module 30 accumulators. By way of illustration, as can be seen in Figure 2, the rear part 32 and the front part 34 form an inverted shoe box, with the rear part 32 forming the lid of this box and the front part 34 the container of this box.
[0041 ] La partie avant 34 est par exemple formée en aluminium. Elle présente une rigidité supérieure à celle de la partie arrière 32. [0041] The front part 34 is for example made of aluminum. It has greater rigidity than the rear part 32.
[0042] Pour comparer la rigidité entre les deux parties (avant et arrière), un test de rigidité peut être mis en œuvre. Lors de ce test, la partie arrière 32 est par exemple fixée à un support de test en un premier point et une contrainte mécanique est appliquée sur cette partie arrière 32 en un second point écarté du premier. La même contrainte mécanique est appliquée à la partie avant 34 fixée sur le même support de test, avec le même écart entre le point de fixation et le point d’application de la contrainte. Il est alors considéré que la partie avant 34 présente une rigidité supérieure à celle de la partie arrière 32 si, à l’issue de l’application de la contrainte mentionnée, il est observé une déformation plus importante au niveau de la partie arrière qu’au niveau de la partie avant 34. [0042] To compare the rigidity between the two parts (front and rear), a rigidity test can be implemented. During this test, the rear part 32 is for example fixed to a test support at a first point and a mechanical stress is applied to this rear part 32 at a second point separated from the first. The same mechanical stress is applied to the front part 34 fixed on the same test support, with the same distance between the fixing point and the point of application of the stress. It is then considered that the front part 34 has a greater rigidity than that of the rear part 32 if, after the application of the mentioned stress, a greater deformation is observed at the level of the rear part than that of the rear part 32. at the level of the front part 34.
[0043] Comme le montre la figure 2, la paroi latérale 34B de la partie avant présente, au niveau de ses coins, des éléments de fixation 34C au support de réception 20 du véhicule automobile 1 . As shown in Figure 2, the side wall 34B of the front part has, at its corners, fixing elements 34C to the receiving support 20 of the motor vehicle 1.
[0044] Ces éléments de fixation 34C se présentent ici sous la forme de colonnes percées d’une ouverture longitudinale conçu pour coopérer avec des moyens de fixation 22A complémentaires présents sur le support de réception 20. [0044] These fixing elements 34C are here in the form of columns pierced with a longitudinal opening designed to cooperate with complementary fixing means 22A present on the receiving support 20.
[0045] Afin que ces éléments de fixation 34C puissent coopérer avec les moyens de 22C du support de réception 20, les éléments de fixation 34C sont positionnés en regard des coins interrompus de la paroi de fond 32B de la partie arrière 32. De cette manière, lorsque le module 30 est rapporté sur le support de réception, la coopération entre les éléments de fixation 34C de la partie avant 34 et les moyens de fixation 22C du support de réception 20 n’est pas entravée par la partie arrière 32 du module 30. [0045] So that these fixing elements 34C can cooperate with the means 22C of the receiving support 20, the fixing elements 34C are positioned opposite the interrupted corners of the bottom wall 32B of the rear part 32. In this way , when the module 30 is attached to the receiving support, the cooperation between the fixing elements 34C of the front part 34 and the fixing means 22C of the receiving support 20 is not hindered by the rear part 32 of the module 30 .
[0046] La partie avant 34 et la partie arrière 32 sont assemblées de manière à délimiter un logement d’accueil d’une pluralité de cellules 35 de batterie d’accumulateurs (dont une seule est visible sur la figure 2). En d’autres termes, lorsqu’elles sont assemblées, la partie avant 34 et la partie arrière 32 forment un boîtier du module 30 de batterie d’accumulateurs logeant la pluralité de cellules 35 de batterie d’accumulateurs. The front part 34 and the rear part 32 are assembled so as to delimit a housing for receiving a plurality of accumulator battery cells 35 (only one of which is visible in Figure 2). In other words, when assembled, the front portion 34 and the rear portion 32 form a housing of the storage battery module 30 housing the plurality of storage battery cells 35.
[0047] De manière avantageuse selon l’invention, la partie avant 34 et la partie avant 32 sont assemblées par soyage de la bordure 32B de la partie arrière 32 et de la paroi latérale 34B de la partie avant 34. [0047] Advantageously according to the invention, the front part 34 and the front part 32 are assembled by countersinking the edge 32B of the rear part 32 and the side wall 34B of the front part 34.
[0048] Dans cette description, on entend par « soyage » une méthode d’assemblage de deux parois métalliques mises bout à bout (dans le prolongement l’une de l’autre) de manière à obtenir une surface finale globalement lisse et sans décalage d’épaisseur entre les deux parois assemblées. Ici, les deux parois métalliques sont, d’une part, la bordure 32B de la partie arrière 32 et, d’autre part, la paroi latérale 34B de la partie avant 34. En d’autres termes ici, chaque portion de la bordure 32B de la partie arrière 32 est assemblée par soyage à la partie correspondante (c’est-à-dire située en regard de la portion de la bordure 32B) de la paroi latérale 34B de la partie avant 34 (figure 2). [0048] In this description, the term “smoothing” means a method of assembling two metal walls placed end to end (in the extension of one another) so as to obtain a final surface that is generally smooth and without offset. thickness between the two assembled walls. Here, the two metal walls are, on the one hand, the border 32B of the rear part 32 and, on the other hand, the side wall 34B of the front part 34. In other words here, each portion of the border 32B of the rear part 32 is assembled by countersinking to the corresponding part (that is to say located opposite the portion of the edge 32B) of the side wall 34B of the front part 34 (Figure 2).
[0049] Cette méthode d’assemblage par soyage permet de former un boîtier de module de batterie d’accumulateurs suffisamment rigide pour contenir les cellules de batterie d’accumulateurs tout en en autorisant la dilatation résultant des efforts thermiques générés par les cellules elles-mêmes lors de leur charge et décharge. [0049] This assembly method by flushing makes it possible to form a storage battery module housing that is sufficiently rigid to contain the storage battery cells while allowing expansion resulting from thermal forces generated by the cells themselves. during their charging and discharging.
[0050] Par ailleurs, cette méthode permet l’assemblage d’une partie arrière et d’une partie avant présentant des épaisseurs différentes et formées de matériaux différents tout en garantissant les propriétés de rigidité et dilatation essentielles à une module de batterie d’accumulateurs. [0050] Furthermore, this method allows the assembly of a rear part and a front part having different thicknesses and formed of different materials while guaranteeing the properties of rigidity and expansion essential to a storage battery module. .
[0051 ] Le soyage est ici favorisé par les propriétés de la bordure 32B telles que décrites précédemment. En effet, une hauteur inférieure à 10 mm et une orientation de la bordure 32B à 90 degrés par rapport à la paroi de fond 32A permettent d’améliorer l’efficacité du soyage. [0051] The merging is here favored by the properties of the edge 32B as described previously. Indeed, a height of less than 10 mm and an orientation of the edge 32B at 90 degrees relative to the bottom wall 32A make it possible to improve the efficiency of the merging.
[0052] De préférence ici, l’assemblage par soyage de la bordure 32B de la partie arrière 32 et de la paroi latérale 34B de la partie avant 34 est réalisé par soudage. Ce soudage est par exemple un soudage laser. [0052] Preferably here, the assembly by countersinking of the edge 32B of the rear part 32 and of the side wall 34B of the front part 34 is carried out by welding. This welding is for example laser welding.
[0053] En variante, le soyage peut correspondre à un assemblage par brasage voire par fixation mécanique, permettant d’obtenir une surface finale lisse, sans décalage d’épaisseur entre la bordure de la partie arrière et la paroi latérale de la partie avant. [0054] La pluralité de cellules 35 de batterie d’accumulateurs est positionnée dans le logement formé par l’assemblage de la partie arrière 32 et de la partie avant 34. Les cellules 35 de batterie d’accumulateurs sont par exemple positionnées les unes à côté des autres. Elles sont par exemple ici au nombre de seize. [0053] Alternatively, the countersinking can correspond to an assembly by brazing or even by mechanical fixing, making it possible to obtain a smooth final surface, with no difference in thickness between the edge of the rear part and the side wall of the front part. [0054] The plurality of accumulator battery cells 35 is positioned in the housing formed by the assembly of the rear part 32 and the front part 34. The accumulator battery cells 35 are for example positioned one next to the other. next to others. For example, there are sixteen of them here.
[0055] En pratique, chaque cellule 35 de batterie d’accumulateurs est par exemple fixée par collage, par un élément de colle 38 représenté sur la figure 2, sur la paroi de fond 32A de la partie arrière 32 du module 30. [0055] In practice, each accumulator battery cell 35 is for example fixed by gluing, by an adhesive element 38 shown in Figure 2, on the bottom wall 32A of the rear part 32 of the module 30.
[0056] Les cellules 35 sont par exemple ici des cellules à enveloppe souple, c’est- à-dire des cellules 35 dont les enveloppes peuvent se déformer lors de leur insertion dans le logement formé par la partie avant 34 et la partie arrière 32 et lors de leurs charge et décharge. De manière avantageuse, la partie avant 34 du module 30 de batterie d’accumulateurs permet de contenir la déformation des cellules grâce à ses propriétés décrites précédemment. The cells 35 are for example here cells with a flexible envelope, that is to say cells 35 whose envelopes can be deformed during their insertion into the housing formed by the front part 34 and the rear part 32 and during their charging and discharging. Advantageously, the front part 34 of the accumulator battery module 30 makes it possible to contain the deformation of the cells thanks to its properties described above.
[0057] Plus particulièrement, les cellules 35 à enveloppe souple comportent une enveloppe extérieure souple qui contient à l’intérieur un électrolyte de solution organique ou d’une solution à base de carbonate et de sels de lithium. [0057] More particularly, the cells 35 with a flexible envelope comprise a flexible outer envelope which contains inside an electrolyte of organic solution or of a solution based on carbonate and lithium salts.
[0058] Il s’agit par exemple d’un électrolyte du type Lithium-ion, enveloppé dans une enveloppe constituée par un film plastique entouré d’un film d’aluminium laminé. Le film plastique est destiné à isoler l’électrolyte contenu dans la cellule 35 du film d’aluminium. [0058] This is for example a Lithium-ion type electrolyte, wrapped in an envelope consisting of a plastic film surrounded by a laminated aluminum film. The plastic film is intended to isolate the electrolyte contained in cell 35 from the aluminum film.
[0059] Ces cellules 35 à enveloppe souple, bien connues de l’homme du métier, ne seront ici pas décrites plus en détail. [0059] These cells 35 with a flexible envelope, well known to those skilled in the art, will not be described here in more detail.
[0060] Afin de permettre l’alimentation en courant électrique du moteur électrique du véhicule automobile 1 , le module 30 de batterie d’accumulateurs (formé de la partie avant 34, de la partie arrière 32 et logeant les cellules 35) est positionné dans le support de réception 20. [0060] In order to enable the supply of electric current to the electric motor of the motor vehicle 1, the accumulator battery module 30 (formed by the front part 34, the rear part 32 and housing the cells 35) is positioned in the reception support 20.
[0061 ] Comme cela est représenté sur la figure 2, le support de réception 20 présente ici une forme globalement parallélépipédique. Il comprend un fond 22 de forme rectangulaire, à partir des bords duquel s’élèvent trois parois latérales 23, 24, 25 qui délimitent entre elles un logement d’accueil 21 du module 30 de batterie d’accumulateurs. Ici, les deux parois latérales 23, 25 sont localisées en regard l’une de l’autre tandis qu’à l’opposé de la paroi latérale 24, le support de réception 20 présente également une portion de paroi latérale s’étendant en regard de cette paroi latérale 24 (mais qui n’est pas représentée sur la figure 2 par souci de clarté). [0062] Le support de réception 22 comprend, au niveau de son fond 22, un circuit de refroidissement 27. L’effet de refroidissement est par exemple obtenu à partir de la circulation d’eau dans le circuit de refroidissement 27. [0061] As shown in Figure 2, the receiving support 20 here has a generally parallelepiped shape. It comprises a bottom 22 of rectangular shape, from the edges of which rise three side walls 23, 24, 25 which delimit between them a reception housing 21 of the accumulator battery module 30. Here, the two side walls 23, 25 are located facing each other while opposite the side wall 24, the receiving support 20 also has a side wall portion extending facing each other. of this side wall 24 (but which is not shown in Figure 2 for the sake of clarity). The receiving support 22 comprises, at its bottom 22, a cooling circuit 27. The cooling effect is for example obtained from the circulation of water in the cooling circuit 27.
[0063] Le circuit de refroidissement 27 est conçu pour refroidir, par conduction, les cellules 35 de batterie d’accumulateurs. Pour cela, la paroi de fond 32 de la partie arrière 32 du module 30 de batterie d’accumulateurs est positionnée au contact du fond 22 du support de réception 20. The cooling circuit 27 is designed to cool, by conduction, the storage battery cells 35. For this, the bottom wall 32 of the rear part 32 of the accumulator battery module 30 is positioned in contact with the bottom 22 of the receiving support 20.
[0064] Afin d’améliorer le phénomène de conduction (et donc le refroidissement), une pâte thermique 26 est positionnée entre le fond 22 du support de réception 20 et la paroi de fond 32 de la partie arrière 32 du module 30 de batterie d’accumulateurs. En d’autres termes, cette pâte thermique 26 est positionnée entre le circuit de refroidissement 27 et la paroi de fond 32 de la partie arrière 32 du module 30 de batterie d’accumulateurs de manière à améliorer l’efficacité de la conduction thermique entre le circuit de refroidissement 27 et les cellules 35 (fixées sur la paroi de fond 32 de la partie arrière 32 du module 30 de batterie d’accumulateurs). [0064] In order to improve the conduction phenomenon (and therefore cooling), a thermal paste 26 is positioned between the bottom 22 of the receiving support 20 and the bottom wall 32 of the rear part 32 of the battery module 30. 'Accumulators. In other words, this thermal paste 26 is positioned between the cooling circuit 27 and the bottom wall 32 of the rear part 32 of the accumulator battery module 30 so as to improve the efficiency of thermal conduction between the cooling circuit 27 and the cells 35 (fixed on the bottom wall 32 of the rear part 32 of the accumulator battery module 30).
[0065] Cette pâte thermique 26 permet d’éviter la formation de lame d’air entre le circuit de refroidissement 27 et les cellules 35, ce qui permet d’améliorer le phénomène de conduction et donc le refroidissement. [0065] This thermal paste 26 makes it possible to avoid the formation of an air gap between the cooling circuit 27 and the cells 35, which makes it possible to improve the conduction phenomenon and therefore the cooling.
[0066] Le support de réception 20 est par exemple formé ici de manière à être étanche aux gouttes d’eau ou aux poussières qui pourraient s’introduire dans l’ensemble 10 de module de batterie d’accumulateurs. L’étanchéité est ici évaluée suivant la norme IP67 selon le standard EN60529. [0066] The receiving support 20 is for example formed here so as to be impervious to drops of water or dust which could enter the accumulator battery module assembly 10. Waterproofing is here evaluated according to the IP67 standard according to the EN60529 standard.
[0067] Afin de permettre la fixation du module 30 sur le support de réception 20, le fond 22 du support de réception 20 comprend des moyens de fixation 22A. Ces moyens de fixations 22A sont conçus pour coopérer avec les éléments de fixation 34C de la partie avant 34 de la paroi latérale 34B du module 30. On dénombre autant de moyens de fixation 22A qu’il y a d’éléments de fixation 34C sur la paroi latérale 34B de la partie avant 34 du module 30. [0067] In order to allow the fixing of the module 30 on the receiving support 20, the bottom 22 of the receiving support 20 comprises fixing means 22A. These fixing means 22A are designed to cooperate with the fixing elements 34C of the front part 34 of the side wall 34B of the module 30. There are as many fixing means 22A as there are fixing elements 34C on the side wall 34B of the front part 34 of the module 30.
[0068] Ici, comme cela est représenté sur la figure 2, les moyens de fixation 22A sont formés par des ergots 22A faisant saillie du fond 22 du support de réception 20. Ces ergots 22A s’étendent, depuis le fond 22, vers l’avant du support de réception 20. [0068] Here, as shown in Figure 2, the fixing means 22A are formed by lugs 22A projecting from the bottom 22 of the receiving support 20. These lugs 22A extend, from the bottom 22, towards the 'front of the receiving support 20.
[0069] Chaque ergot 22A coopère ici, par emboîtement, avec une ouverture longitudinale correspondante d’une colonne 34C de la paroi latérale 34B de la partie avant 34. [0069] Each lug 22A cooperates here, by nesting, with an opening corresponding longitudinal section of a column 34C of the side wall 34B of the front part 34.
[0070] La fixation du module de batterie d’accumulateurs sur le support de réception peut être réalisée de manière différente. Par exemple, selon une variante non représentée, la bordure peut être continue sur toute la périphérie de la paroi de fond (en d’autres termes, en variante, la bordure peut être continue, y compris au niveau de ses coins). Dans ce cas, la paroi de fond de la partie arrière peut présenter des ouvertures, par exemple localisées à proximité des coins de la paroi de fond de la partie arrière. [0070] Fixing the accumulator battery module on the receiving support can be carried out in a different way. For example, according to a variant not shown, the border can be continuous over the entire periphery of the back wall (in other words, alternatively, the border can be continuous, including at its corners). In this case, the bottom wall of the rear part may have openings, for example located near the corners of the bottom wall of the rear part.
[0071 ] Ainsi, la fixation du module 30 sur le support de réception 20 peut être réalisée par le passage d’éléments de fixation (telles que des vis) au travers des colonnes de la paroi latérale de la partie avant, puis au travers des ouvertures de la paroi de fond de la partie arrière de manière à coopérer avec des moyens de fixation complémentaires présents dans le fond du support de réception. [0071] Thus, the fixing of the module 30 on the receiving support 20 can be carried out by passing fixing elements (such as screws) through the columns of the side wall of the front part, then through the openings in the bottom wall of the rear part so as to cooperate with complementary fixing means present in the bottom of the receiving support.
[0072] De manière générale, il est à noter que les dimensions des parties avant et arrière du module de batterie d’accumulateurs, ainsi que celles du support de réception, sont adaptées en fonction du nombre de cellules de batterie d’accumulateurs logées dans le module. Dans l’exemple décrite précédemment, les dimensions sont ajustées de manière à ce que le module de batterie d’accumulateurs contienne 16 cellules. [0072] In general, it should be noted that the dimensions of the front and rear parts of the accumulator battery module, as well as those of the receiving support, are adapted according to the number of accumulator battery cells housed in the module. In the example described above, the dimensions are adjusted so that the storage battery module contains 16 cells.
[0073] Le mode de réalisation décrit précédemment ne concerne qu’un support de réception associé à un module de batterie d’accumulateurs. [0073] The embodiment described above only concerns a reception support associated with a storage battery module.
[0074] La présente invention s’applique bien entendu dans le cas où une pluralité de modules de batterie d’accumulateurs est comprise dans le véhicule automobile. Dans un tel cas, il peut être considéré une pluralité d’ensemble 10 de modules de batterie d’accumulateurs juxtaposés les uns à côté des autres dans le véhicule automobile. Il peut également être considéré un support de réception unique accueillant une pluralité de modules de batterie d’accumulateurs (les modules de batterie d’accumulateurs étant positionnés par exemple les uns à côtés des autres sur le fond du support de réception unique). [0074] The present invention obviously applies in the case where a plurality of accumulator battery modules are included in the motor vehicle. In such a case, a plurality of sets 10 of accumulator battery modules can be considered juxtaposed next to each other in the motor vehicle. It can also be considered a single receiving support accommodating a plurality of accumulator battery modules (the accumulator battery modules being positioned for example next to each other on the bottom of the single receiving support).
[0075] Finalement, grâce à la réalisation du boîtier du module de batterie d’accumulateurs en deux parties distinctes présentant des caractéristiques différentes (en matériaux et épaisseurs par exemple), il est possible d’adapter ce boîtier en fonction des efforts thermiques générés par les cellules de batterie d’accumulateurs de manière à contenir ces effets de dilation dus aux cellules elles- mêmes. [0075] Finally, thanks to the production of the housing of the accumulator battery module in two distinct parts having different characteristics (in materials and thicknesses for example), it is possible to adapt this housing according to the thermal forces generated by battery cells of accumulators so as to contain these expansion effects due to the cells themselves.
[0076] Grâce à l’invention, il est donc possible de mettre en œuvre un compromis dans la réalisation du boîtier de manière à obtenir une certaine rigidité tout en garantissant un refroidissement efficace des cellules. Etant données les caractéristiques d’épaisseur de la partie arrière du boîtier du module de batterie d’accumulateurs, les échanges thermiques entre le circuit de refroidissement et les cellules sont optimisés, permettant alors un refroidissement performant du module de batterie d’accumulateurs. [0077] Enfin, cette mise en œuvre permet de diminuer le poids du module de batterie d’accumulateurs, et donc, de manière avantageuse, d’en réduire le coût de fabrication. [0076] Thanks to the invention, it is therefore possible to implement a compromise in the production of the housing so as to obtain a certain rigidity while guaranteeing effective cooling of the cells. Given the thickness characteristics of the rear part of the storage battery module housing, the thermal exchanges between the cooling circuit and the cells are optimized, allowing efficient cooling of the storage battery module. [0077] Finally, this implementation makes it possible to reduce the weight of the accumulator battery module, and therefore, advantageously, to reduce its manufacturing cost.

Claims

REVENDICATIONS
[Revendication 1 ] Module (30) de batterie d’accumulateurs comprenant : [Claim 1] Accumulator battery module (30) comprising:
- une partie arrière (32) munie d’une paroi de fond (32A), destinée à être mise en contact avec un circuit de refroidissement (27), et d’une bordure (32B) longeant la paroi de fond (32A), la paroi de fond (32A) présentant une épaisseur inférieure à 3 millimètres, et - a rear part (32) provided with a bottom wall (32A), intended to be brought into contact with a cooling circuit (27), and with a border (32B) running along the bottom wall (32A), the bottom wall (32A) having a thickness of less than 3 millimeters, and
- une partie avant (34) comportant une paroi avant (34A) bordée par une paroi latérale (34B), ladite paroi latérale (34B) s’étendant en direction de la bordure (32B) de la partie arrière (32), la partie avant (34) délimitant avec la partie arrière (32) un logement d’accueil d’une pluralité de cellules (35) d’accumulateurs, la partie avant (34) et la partie arrière (32) étant assemblées par soyage de ladite bordure (32B) de la partie arrière (32) et de la paroi latérale (34B) de la partie avant (34). - a front part (34) comprising a front wall (34A) bordered by a side wall (34B), said side wall (34B) extending towards the edge (32B) of the rear part (32), the part front (34) delimiting with the rear part (32) a housing for receiving a plurality of accumulator cells (35), the front part (34) and the rear part (32) being assembled by countersinking said edge (32B) of the rear part (32) and the side wall (34B) of the front part (34).
[Revendication 2] Module (30) de batterie d’accumulateurs selon la revendication 1 , dans lequel la bordure (32B) présente une hauteur inférieure à 10 millimètres.[Claim 2] Storage battery module (30) according to claim 1, in which the edge (32B) has a height of less than 10 millimeters.
[Revendication 3] Module (30) de batterie d’accumulateurs selon la revendication 1 ou 2, dans lequel le soyage comprend un assemblage de la bordure (32B) de la partie arrière (32) et de la paroi latérale (34B) de la partie avant (34) par soudage laser. [Claim 3] Accumulator battery module (30) according to claim 1 or 2, wherein the support comprises an assembly of the edge (32B) of the rear part (32) and the side wall (34B) of the front part (34) by laser welding.
[Revendication 4] Module (30) de batterie d’accumulateurs selon l’une quelconque des revendications 1 à 3, dans lequel l’épaisseur de la paroi de fond (32A) est comprise entre 0,3 et 2 millimètres. [Claim 4] Storage battery module (30) according to any one of claims 1 to 3, in which the thickness of the bottom wall (32A) is between 0.3 and 2 millimeters.
[Revendication 5] Module (30) de batterie d’accumulateurs selon l’une quelconque des revendications 1 à 4, dans lequel la partie avant (34) présente une rigidité supérieure à celle de la partie arrière (32). [Claim 5] Storage battery module (30) according to any one of claims 1 to 4, wherein the front part (34) has greater rigidity than the rear part (32).
[Revendication 6] Module (30) de batterie d’accumulateurs selon l’une quelconque des revendications 1 à 5, dans lequel ladite bordure (32B) est interrompue au niveau de coins. [Claim 6] A storage battery module (30) according to any one of claims 1 to 5, wherein said edge (32B) is interrupted at corners.
[Revendication 7] Module (30) de batterie d’accumulateurs selon la revendication 6, dans lequel la paroi latérale (34B) de la partie avant (34) présente, au niveau de ses coins, des éléments de fixation (34C) à un support de réception (20) d’un véhicule automobile (1 ), lesdits éléments de fixation (34C) étant positionnés en regard des coins interrompus de la bordure (32B) de la partie arrière (32). [Claim 7] Accumulator battery module (30) according to claim 6, in which the side wall (34B) of the front part (34) has, at its corners, fixing elements (34C) to a receiving support (20) of a motor vehicle (1), said fixing elements (34C) being positioned opposite the interrupted corners of the edge (32B) of the rear part (32).
[Revendication 8] Ensemble (10) de module de batterie d’accumulateurs comprenant : [Claim 8] Set (10) of accumulator battery module comprising:
- un support de réception (20) d’un module (30) de batterie d’accumulateurs, ledit support de réception (20) étant muni d’un circuit de refroidissement (27), et- a receiving support (20) for a storage battery module (30), said receiving support (20) being provided with a cooling circuit (27), and
- un module (30) de batterie d’accumulateurs selon l’une quelconque des revendications 1 à 7, la paroi de fond (32A) de la partie arrière (32) dudit module (30) de batterie d’accumulateurs étant positionnée en contact dudit circuit de refroidissement (27). - a storage battery module (30) according to any one of claims 1 to 7, the bottom wall (32A) of the rear part (32) of said storage battery module (30) being positioned in contact of said cooling circuit (27).
[Revendication 9] Ensemble (10) de module de batterie d’accumulateurs selon la revendication 8 prise dans la dépendance de la revendication 7, dans lequel le support de réception (20) comprend des moyens de fixation (22A) dudit module (30) de batterie d’accumulateurs, lesdits moyens de fixation (22A) étant destinés à coopérer avec les éléments de fixation (34C) de la paroi latérale (34B) de la partie avant (34) dudit module (30) de batterie d’accumulateurs. [Claim 9] Accumulator battery module assembly (10) according to claim 8 taken in dependence on claim 7, wherein the receiving support (20) comprises fixing means (22A) of said module (30) accumulator battery, said fixing means (22A) being intended to cooperate with the fixing elements (34C) of the side wall (34B) of the front part (34) of said accumulator battery module (30).
[Revendication 10] Véhicule automobile (1 ) comprenant un ensemble (10) de module de batterie d’accumulateurs selon la revendication 8 ou 9. [Claim 10] Motor vehicle (1) comprising a set (10) of accumulator battery module according to claim 8 or 9.
PCT/EP2023/073051 2022-09-14 2023-08-22 Storage battery module, storage battery module assembly comprising such a module and associated motor vehicle WO2024056325A1 (en)

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FR2209241A FR3139672A1 (en) 2022-09-14 2022-09-14 Accumulator battery module, accumulator battery module assembly comprising such a module and associated motor vehicle
FRFR2209241 2022-09-14

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Citations (4)

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EP3637495A1 (en) 2017-10-30 2020-04-15 LG Chem, Ltd. Battery module and method for assembling battery module
KR20210048976A (en) * 2019-10-24 2021-05-04 주식회사 엘지화학 Battery module and battery pack including the same
US20210184303A1 (en) * 2019-12-17 2021-06-17 Sk Innovation Co., Ltd. Battery Module
US20220102799A1 (en) * 2020-09-29 2022-03-31 Hl Greenpower Inc. Miniaturized battery module and battery pack having the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3637495A1 (en) 2017-10-30 2020-04-15 LG Chem, Ltd. Battery module and method for assembling battery module
KR20210048976A (en) * 2019-10-24 2021-05-04 주식회사 엘지화학 Battery module and battery pack including the same
US20210184303A1 (en) * 2019-12-17 2021-06-17 Sk Innovation Co., Ltd. Battery Module
US20220102799A1 (en) * 2020-09-29 2022-03-31 Hl Greenpower Inc. Miniaturized battery module and battery pack having the same

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